<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>案例-头像上传</title>
  <link rel="stylesheet" href="./css/bootstrap.min.css">
  <style>
    .thumb-box {
      text-align: center;
      margin-top: 50px;
    }

    .thumb {
      width: 250px;
      height: 250px;
      object-fit: cover;
      border-radius: 50%;
    }
  </style>
</head>

<body>
  <div class="thumb-box">
    <!-- 头像 -->
    <img src="./images/cover.jpg" class="img-thumbnail thumb" alt="">
    <div class="mt-2">
      <!-- 文件选择框 -->
      <!-- accept 属性表示可选择的文件类型 -->
      <!-- image/* 表示只允许选择图片类型的文件 -->
      <input type="file" id="iptFile" accept="image/*" style="display: none;">
      <!-- 选择头像图片的按钮 -->
      <button class="btn btn-primary" id="btnChoose">选择 & 上传图片</button>
    </div>
  </div>

  <script src="./lib/axios.js"></script>

  <script>

    document.querySelector('#btnChoose').addEventListener('click', function () {

      // 自执行
      document.querySelector('#iptFile').click()

    })


    document.querySelector('#iptFile').addEventListener('change', async function () {

      // 事件源的属性
      // console.dir(this)

      // console.log(this.files)

      const fdtype = ['image/png', 'image/gif', 'image/jpeg']

      if (!this.files.length <= 0 && this.files[0].size > 50 * 1024 && fdtype.includes(this.files[0].type)) {

        // console.log(1)

        let fd = new FormData()

        fd.append('avatar', this.files[0])

        const { data } = await axios({

          method: 'POST',

          url: 'http://www.itcbc.com:3006/api/formdata',

          data: fd
        })

        // console.log(data)

        document.querySelector('img').src = data.data.filename



      } else {

        return alert('只能是图片 并且是选择小于500kB')
      }


    })



  </script>
</body>

</html>